CN1237655C - Printed multi-band patch antenna - Google Patents

Printed multi-band patch antenna Download PDF

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Publication number
CN1237655C
CN1237655C CNB998162191A CN99816219A CN1237655C CN 1237655 C CN1237655 C CN 1237655C CN B998162191 A CNB998162191 A CN B998162191A CN 99816219 A CN99816219 A CN 99816219A CN 1237655 C CN1237655 C CN 1237655C
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CN
China
Prior art keywords
antenna
sticking patch
communication equipment
patch
tuned
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Expired - Lifetime
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CNB998162191A
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CN1357163A (en
Inventor
应志农
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Telefonaktiebolaget LM Ericsson AB
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Telefonaktiebolaget LM Ericsson AB
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H04B1/3833—Hand-held transceivers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • H01Q13/16—Folded slot antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
    • H01Q9/27—Spiral antennas

Abstract

The present invention provides a miniature, built-in multi-band antenna which is suitable for use in future compact mobile terminals. According to exemplary embodiments, a built-in patch antenna is provided which includes patch elements of different sizes and capable of being tuned to different frequency bands. On each patch element is formed a slot which divides the patch element into sub-parts. Each sub-part of a patch element is structured so as to be resonant at a frequency in the same frequency band to which the patch element is tuned. As a result, a high efficiency, broad band, multi-band, and surface mountable low profile antenna can be realized.

Description

The multi-band patch antenna of printing
Relevant application
The application and Ying are the application serial No.09/112 of " Miniature PrintedSpiral Antenna for Mobile Terminals " at the exercise question of 1998.7.9. application, 366 U.S. patent and Ying are the application serial No.09/112 of " Twin Spiral DualBand Antenna " at the exercise question of 1998.7.9. application, 152 U.S. patent is relevant, both at this all with for referencial use.
Background technology
The present invention relates generally to radio communications system, and be particularly related to built-in antenna, it can be incorporated in the portable terminal and allows this portable terminal to communicate by letter in different frequency ranges.
Cellular telephone industry has had significant progress in the U.S. and other places, the world in commercial operation.The capacity that also exceeds system in the far super desired value of growth of main residential block, big city very soon.If this impetus continues, the influence of the growth of this industry will arrive even minimum market at once.Require the scheme of innovation to meet these needs that increase capacity and the growth that keeps high-quality service and avoid price.
The overall view world, an important step that promotes wireless communication system is that the change analogue transmission is a Digital Transmission.Of equal importance is to select effective digital transmission scheme to realize next-generation technology, and for example time division multiple access inserts (TDMA) or code division multiple access inserts (CDMA).In addition, people deeply convince, that application can be convenient for carrying and be used for being in, office, street, vehicle etc. carry out or the low price of receipt of call, the first generation personal communication network (PCN) (PCN) of the cordless telephone of pocketization will be provided by the honeycomb fashion carrier wave that for example uses Digital Cellular System foundation structure of future generation.
For an acceptable equipment compatibility grade is provided, created multiple standards in different regions, the world, for example, mock standard, as AMPS (advanced mobile telephone system), NMT (NMT) and ETACS and issued digital standard are as D-AMPS (for example by EIA/TIA-IS-54-B and IS-136 appointment) and GSM (global system that is used for mobile communication that is adopted by ETSI), so that to radio communications system standardized designs standard.In case create, these standards are tended to be reused with identical or similar fashion, to draft the technical conditions of spare system in detail.For example, except that original gsm system, also have DCS1800 (being specified by ETSI) and PCS1900 (pressing J-STD-007 by JIC specifies), the both is based on GSM.
Yet nearest progress comprises the employing additional frequency bands in the mobile communication of bookkeeping in cellular communication service, for example, is used for Personal Communications Services (PCS) service.Get the U.S. as an example, designated cell super band (hyperband) is assigned to two frequency ranges (generally claiming A frequency range and B frequency range), is used to transmit and controls communicating by letter of 800MHz scope.On the other hand, in the 1900MHz scope, this PCS super band is designated as in the U.S. and comprises six different frequency ranges (A, B, C, D, E and F).Like this, thus can utilize 8 frequency ranges to make things convenient for communication service now at any given service area of the U.S..Some standard approved is used for PCS super band (for example, PCS 1900 (J-STD-007)), and other approved is used for honeycomb super band (for example, D-AMPS (IS-136)).
The frequency range that each appointment is used for honeycomb and PCS super band is assigned to a plurality of Traffic Channels, and at least one access or control channel.Use control channel by the information Control that is sent to mobile radio station and receives from mobile radio station or the work of supervision mobile radio station.When a mobile radio station leaves the radio coverage of a mesh and enters the radio coverage of another mesh, such information can comprise the Incoming call signal, the outbound call signal, paging signal, paging response signal, location register signal, voice channel is distributed, hold instruction, handover and mesh are selected or selection instruction.This control and voice channel can be used analog-modulated or digital modulation mode work.
Received by mobile or portable terminal by a signal that the base station sent in the down link on professional and control channel, each in them has at least one antenna.Historical ground, portable terminal are with interface reception aloft of a plurality of dissimilar antennas and transmission signal.For example, having found provides good radiation characteristic perpendicular to the unipole antenna that a conductive surface is installed, desirable driving point impedance and relative simple structure.Unipole antenna can be constructed with multiple physics mode.For example, rod-type or whip antenna are used in combination with portable terminal continually.For the frequency applications occasion that the length of antenna is minimized, helical antenna is another kind of the selection.
As mentioned above, it will be pressing for of market at the moment that the portable terminal that can be operated in the frequency range that differs widely is provided, and for example, be positioned at the frequency range of 900MHz scope and will be positioned at the frequency range of 1800MHz scope.Therefore in portable terminal, will need to use the antenna that suitable gain and bandwidth are provided in the near future in two frequency ranges.Carry out some trial and removed to make such dual-band antenna.
For example, the United States Patent (USP) U.S.4 of mandate Phillips etc., 571,595 have described a kind of antenna with zigzag conductor element.This antenna can be tuned to one of the close frequency range in two intervals (for example the center is at 915MHz and 960MHz).But the efficient of this Antenna Design is quite low, because its casing near mobile phone like this physically.
Japanese Patent No. 6-37531 discloses a kind of helix structure, and it comprises an endoparasitism Metallic rod.In this patent, the position that antenna can be by regulating this Metallic rod be tuned to dual resonance frequency.Unfortunately, too narrow for use bandwidth of this design in cellular communication.
Known two-band printed monopole antenna, wherein double resonance is by bringing realization near the additional parasitism in printed monopole antenna place.And such antenna has enough bandwidth and is used for cellular communication, but its requires an additional parasitic band.The Moteco AB of Sweden has designed a kind of coil coupling two-band whip antenna and coil antenna, and wherein double resonance realizes by regulating this coil matching element (to 900MHz 1/4 λ with for 1800MHz 1/2 λ).This antenna has quite good bandwidth and the width of cloth is penetrated performance and the about 40mm of length.Disclose a kind of spiral dual-band antenna heterogeneous in the common u.s. patent application serial number of transferring the possession of 08/725,507 that do not examine, common, its size is quite little, and name is called " Multiple BandNon-Uniform Helical Antennas ".
DE-A-19707535 discloses a kind of sheet metal antenna, and this antenna has the metal wire sections of many various links.One end of the metal wire sections of these links is connected to a conducting strip.This various metal wire sections is a rectilinear form.Article one, the intermetallic metal line segment is connected to one second sheet metal by its other end.Second sheet metal is connected to the conductive pane rack-layer that is placed on below conductive strips and the metal wire sections.Signal wave-guides is coupled to this intermetallic metal line segment and is connected to the conductive pane rack-layer.This metal wire sections is used for tuned antenna simultaneously and received signal.
At present, be used for radio communication equipment for example the antenna of mobile phone all be directly installed on the casing of telephone set.Yet, because the size of portable terminal and weight reduces continuing, so above-mentioned antenna will be because its size benefits will become more and more littler.In addition because the functionality of the small-sized portable terminal in these futures increasing, so to can resonance in the machine of multiband need the increasing of small size antenna.
At present, use the common machine internal antenna in mobile phone to comprise microstrip antenna and planar inverted-F antenna.The microstrip antenna size is little in light weight.Planar inverted-F antenna (PIFA) is implemented in a kind of mobile phone intercom (handset), as described: " Inverted-F Antenna for Portable Handsets " by K.Qassim, IEE ColloqiumOn Microwave Filters And Antennas for Personal CommunicationSystem, pp.3/1-3/6, Feb.1994, London, UK. are nearest in addition, and Lai etc. disclose a kind of bending inverse-F antenna (WO 96/27219).The size of this antenna approximately is 40% of a common PIFA antenna.
Figure 1A and 1B explanation common plane patch antenna are compared with the bending inverse-F antenna of descriptions such as Lai.The common plane patch antenna of Figure 1A no matter size and length equals for example quarter-wave of antenna resonant frequency.The width of common plane patch antenna also is W.The bending inverse-F antenna that illustrates among Figure 1B also has the quarter-wave of the resonance frequency of equaling and equals the width of W; But the size of bending inverse-F antenna is about 40% of common plane patch antenna size.This size reduce shape owing to the antenna bending.
Yet, when mobile phone becomes more and more hour, no matter be that common little band sticking patch or PIFA antenna is still too big so that can not be fit to following little telephone casing.What examine jointly, the common name of transferring the possession of is called the u.s. patent application serial number No.09/112 of " Miniature Printed Spiral Antenna forMobile Terminals ", recommend a kind of printing screw machine internal antenna in 366, had a coupling terminal.Its dimension reduction to the 20-30% of common PIFA antenna (less than wavelength 1/10), so it is applicable to following mobile phone.
Except that reducing antenna size, next-generation mobile phone will require honeycomb, WLAN (wireless local area network), and GPS and branch energy collecting are transferred to more than a frequency range.Be called in name in the common u.s. patent application serial number 09/112,152 of examining, transferring the possession of jointly of " Twin Spiral DualBand Antenna ", recommended a kind of built-in antenna of multiband, this antenna is suitable for following mobile phone.This built-in antenna comprises two spiral conductor arms, its length different and can be tuned to different frequency ranges.For increasing the bandwidth of antenna, introduced the resistance loading technique.
Existence is to needs efficient, the minicomputer internal antenna, its can be tuned to a plurality of frequency ranges, in each of those a plurality of frequency ranges, have wide bandwidth simultaneously.
Summary of the invention
The present invention overcomes the technical defective of above-mentioned discovery by the small-sized built-in multi-band patch antenna that is suitable for use in the following small mobile terminals is provided.According to exemplary embodiment, patch antenna comprises feed and earth point in a kind of machine that provides, coupling electric bridge and different size and can be tuned to the patch element of different frequency range.Form a groove on each patch element, it is divided into subdivision with this patch element.Constitute each subdivision of patch element, make its by resonance patch element be tuned to a frequency of similar frequency bands on.The result can realize efficiently, broadband, multiband and the frivolous antenna of surperficial installable outward appearance.
Description of drawings
According to the explanation of following preferred embodiment with reference to accompanying drawing, above-mentioned purpose of the present invention and feature will be more apparent, wherein:
The comparison of Figure 1A and 1B explanation common plane patch antenna and common crooked inverse-F antenna;
Fig. 2 illustrates an example wireless electrical communication equipment, wherein can implement antenna of the present invention;
Fig. 3 explanation is by an exemplary built-in multi-band patch antenna of the present invention;
Fig. 4 illustrates a kind of exemplary antenna configuration, and wherein each sticking patch part is formed by three subdivisions;
Fig. 5 A and 5B explanation form by broadband of the present invention the process of multiband aerial;
Fig. 6 A explanation is by the top view of a kind of rectangle two parts two-band patch antenna of the present invention's first exemplary embodiment;
Fig. 6 B explanation is by the two-partial L-groove patch antenna of the present invention's second exemplary embodiment.
Fig. 6 C explanation is by the two-partial L-groove patch antenna of the present invention's the 3rd exemplary embodiment, and wherein patch antenna is an arbitrary shape;
Fig. 6 D explanation is by two-part groove-patch antenna of the present invention's the 4th exemplary embodiment, and wherein sticking patch and groove all are arbitrary shapes;
The furnish an explanation figure of bandwidth of Fig. 7, it can the subdivision of big sticking patch part be realized from Fig. 6 B; And
Fig. 8 illustrates the simulation result of GSM/DCS two-band patch antenna of the present invention.
Embodiment
Fig. 2 illustrates an example wireless electrical communication equipment 200, wherein can implement built-in multi-band patch antenna of the present invention.Communication equipment 200 comprises casing 210, has microphone aperture 220 and speaker openings 230, is positioned at mouth and ear near the user respectively.Keyboard 240 allows the user for example to interact by telephone number and the communication equipment that input is dialled.Communication equipment 200 also comprises patch antenna assembly 250 in the machine, and its details will be described below.
Fig. 3 explanation is by patch antenna assembly in the exemplary machine of the present invention.According to the present invention, the patch antenna assembly comprises two sticking patch parts 305 and 310 in this exemplary machine, and each size is inequality.Two sticking patch parts 305 and 310 are attached to printed circuit board (PCB) (PCB) 315 and are connected to the opposite side of coupling electric bridge 330 by dielectric substrate 320.Groove 340 is formed in each sticking patch part 305 and 310, and it partly is divided into subdivision with this sticking patch, and its importance goes through below.Sticking patch part 305 and 310 is placed on the PCB 315 and between sticking patch part and PCB 315 and forms groove.Those skilled in the art will be understood the primary feed (or transducer) that sticking patch partly forms antenna system of the present invention.
As from Fig. 3 obvious, sticking patch part 305 and 310 is carried out feed by supply lead 325.Built-in antenna also comprises a coupling electric bridge 330 that is placed between supply lead 325 and the earth terminal 335.Coupling electric bridge 330 plays a minor loop antenna between tuned antenna and formation supply lead 325 and the earth terminal 335.The impedance that tuned antenna intention coupling is seen to antenna side at antenna input makes that this input impedance of seeing is a pure resistive, and promptly it will not have estimable reactive component.Antenna system of the present invention tuning is by measurement or the estimation input impedance relevant with antenna and provides a suitable impedance matching circuit (promptly mating electric bridge) to realize.Coupling by antenna of the present invention can be regulated by the length that changes coupling electric bridge 330.This can finish by the position that changes earth terminal 335 simply.The length of coupling electric bridge usually is the magnitude at 0.01 λ-0.1 λ.
As from Fig. 3 obvious, two sticking patch parts 305 of antenna system are different with 310 size.By the size of control sticking patch part, antenna can be tuned to different frequencies.The size that the first sticking patch part 305 of multiband aerial has (be generally this sticking patch partially-tuned to the quarter-wave of frequency range) make it be tuned on first the frequency than low-frequency range, and the size that the second sticking patch part 310 has makes it be tuned on the frequency of second higher frequency band.This two parts sticking patch energy resonance is on any frequency.For example, first frequency range can be the GSM frequency range, and second frequency range can be the DCS frequency range.For example, other possible combinations low and high band comprise GSM+PCS, GSM+WCDMA, DCS+WCDMA, GSM+GPS, GSM+ISM, or any other lower and more combination of high band.
As mentioned above, each sticking patch part 305 and 310 comprises and plays a groove 340 that sticking patch is separated into the subdivision effect.Each subdivision resonance of sticking patch part this sticking patch partially-tuned to similar frequency bands in different frequency on.For example, if the size of the first sticking patch part 305 makes its resonance on the frequency of GSM frequency range, then the subdivision of sticking patch part 305 can the different frequency of resonance in this GSM frequency range on.The result can realize wideer bandwidth.
Those skilled in the art will be understood, and as a kind of modification, each sticking patch part can form three or more subdivisions.Fig. 4 illustrates a kind of exemplary configuration, and wherein each sticking patch partly forms three subdivisions.As described, the first sticking patch part 405 is cut into three subdivision 405A-405C, and the second sticking patch part 410 also is cut into three subdivision 410A-410C.Each subdivision can the different frequency of resonance in the similar frequency bands of their each sticking patch partial resonances on.Like this, can realize wideer bandwidth by this configuration, yet, tuning more difficult.
Turn back to Fig. 3, sticking patch part 305 and 310 shapes can be arbitrarily, comprise three-dimensional.Yet, 1/4th of the wavelength of the frequency that the size of sticking patch part should partly be tuned near this sticking patch.
The resonance frequency of built-in multi-band patch antenna of the present invention and bandwidth depend on the area and the thickness of dielectric substrate, the type of selected dielectric material (being dielectric constant), the size of patch size and groove and position.Those skilled in the art will be understood, the increase that reduces to cause its bandwidth that can realize of the increase of the area of dielectric substrate or thickness or patch size or dielectric constant values.In addition, bandwidth also depends on the size and the position of the groove that forms in this sticking patch part.
As from Fig. 3 obvious, built-in multi-band patch antenna of the present invention can be installed in the edge of PCB, this will provide good radiation efficiency and bandwidth.In addition, because the little PCB space requirement minimum of its size for the built-in multi-band patch antenna.
Fig. 5 A and 5B illustrate a kind of technology, can form broadband of the present invention with it, the patch antenna of multiband.Broadband of the present invention, the patch antenna of multiband can be formed by a common patch antenna, its method is that the axle along the coupling electric bridge forms a groove in common patch antenna, for example illustrated in Figure 1A, produce two sticking patch parts thus and be connected to the opposite side (seeing Fig. 5 A) that mates electric bridge.Every part is a kind of size, in order that resonance is on different frequencies.Major part 505 resonance are on a lower frequency, and smaller portions 510 resonance are on a higher frequency.Can come the actual landform grooving with any following method: cutting, etching, MID (3D metallization) or chemical treatment.
In each sticking patch part, form a groove then so that each sticking patch partly is divided into subdivision (referring to Fig. 5 B).Groove can be an arbitrary shape; But the shape of groove will influence accessible bandwidth.As noted above, each subdivision resonance of sticking patch part this sticking patch partially-tuned to similar frequency bands in a different frequency on, increased the bandwidth of this antenna thus.
The design of Fig. 6 A-6D explanation patch antenna.Fig. 6 A explanation is by the top view of rectangle two-part two-band patch antenna of the present invention's first exemplary embodiment.The dotted line that constitutes by supply lead 325 and ground lead 335 is divided into right left half 605 and 610 respectively with sticking patch.Right half 605 sizes are big, be a low-frequency resonator, and left half 610 are high-frequency reonsators.As from Fig. 6 A obvious, on each sticking patch part, form groove to produce a kind of twin coiled arrangement, be similar at u.s. patent application serial number No.09/112, represented in 152.But in this case, this hurricane band line is actually a spiral sticking patch, causes the improvement on bandwidth.
Fig. 6 B explanation is by two-partial L groove patch antenna of the present invention's second exemplary embodiment.As described, each sticking patch part 615 and 620 is being rectangle in shape.As among Fig. 6 A, dotted line is divided into sticking patch right left half 615 and 620 respectively.Right half 615 is low-frequency resonator, and left half 620 is high-frequency reonsators.Partly form the groove of a L-shape at each sticking patch.These grooves partly are divided into two subdivisions with sticking patch.For example right half is divided into subdivision 615A and 615B.Similarly, left half 620 is divided into subdivision 620A and 620B.As mentioned above, each subdivision resonance of sticking patch part sticking patch partially-tuned to similar frequency bands in a different frequency on.For example, for son- part 615A and 615B, my husband-part 615A resonance is at a lower frequency (f L) on, and interior part 615B resonance is at a upper frequency (f H) on.As a result, in similar frequency bands, realize wide bandwidth.Fig. 7 explanation is by the multi resonant of the sticking patch part of this embodiment of the invention ability of shaking.As shown, can realize Broadband Matching.
Fig. 6 C and the configuration of 6D illustrated example, wherein, in Fig. 6 C, sticking patch partly has the groove of L-shape and the shape of sticking patch part all is arbitrarily, and in Fig. 6 D, sticking patch part and its shape of groove all are arbitrarily.Be similar to Fig. 6 A and 6B, the dotted line in Fig. 6 C and 6D is with the sticking patch separated into two parts.Sticking patch portion size less (promptly respectively in Fig. 6 C and 6D 630 and 640) in each of Fig. 6 C and 6D, therefore be a high-frequency reonsator, and another sticking patch portion size big (promptly respectively in Fig. 6 C and 6D 625 and 635) is a low-frequency resonator therefore.Groove on each sticking patch part partly is divided into two subdivisions with this sticking patch, each subdivision resonance each sticking patch partially-tuned to similar frequency bands in a different frequency on.For example in Fig. 6 C, big sticking patch 625 is divided into two son- part 625A and 625B, and less sticking patch part 630 is divided into son-part 630A and 630B.In Fig. 6 D, big sticking patch part 635 is divided into two son-part 635A and 635B similarly, and less sticking patch part 640 is divided into son-part 640A and 640B.As a result, can realize the coupling of wide bandwidth by the configuration in Fig. 6 C and 6D.
For validity of the present invention is described, Fig. 8 is set out in the simulation result of the exemplary two-band patch antenna that illustrates among Fig. 4 B.This its length of two parts two-band patch antenna is 0.1 wavelength, and width is 0.12 wavelength and is 0.02 wavelength highly.The sticking patch partial resonance is in GSM and DCS frequency range.At the GSM band bandwidth is 8.7% (promptly about 80MHz), and is 9.4% (promptly about 170MHz) in the DCS frequency range, and corresponding VSWR was less than 2.5: 1.Fig. 5 illustrates the VSWR performance of this design.As from Fig. 5 obvious, this antenna can meet the requirement that the GSM/DCS two-band is used.
Principle of the present invention, most preferred embodiment and operator scheme have below been described.But the present invention should not be interpreted into to being restricted to specific embodiment discussed above.For example, when antenna of the present invention mainly was discussed as a radiator, those skilled in the art will appreciate that two-band patch antenna of the present invention can also be as the transducer that receives information on characteristic frequency.

Claims (12)

1. the communication equipment used of radio communications system of a confession, said equipment is characterised in that:
A microphone aperture is used to make this communication equipment to receive auditory information from a user;
A speaker openings is used to make this communication equipment to transmit auditory information to said user;
A keyboard; And
A built-in multi-band patch antenna comprises:
Supply lead (325),
Ground lead (335),
Coupling electric bridge (330) is placed between supply lead and the ground lead, is used for tuned antenna,
First sticking patch part (305), be tuned to first frequency range,
Second sticking patch part (310), be tuned to second different frequency range, and
At least one groove (340) is formed on said first and second sticking patch in each.
2. the communication equipment of claim 1 is characterized in that sticking patch partly is a 3D shape.
3. the communication equipment of claim 1 is characterized in that said sticking patch partly is a two-dimensional shapes.
4. the communication equipment of claim 1 is characterized in that said coupling electric bridge is the input impedance that is used for mating said antenna.
5. the communication equipment of claim 4, the coupling that it is characterized in that said antenna are by the length adjustment that changes this coupling electric bridge.
6. the communication equipment of claim 1 is characterized in that said at least one groove partly is divided into subdivision with each sticking patch.
7. the communication equipment of claim 6, each the subdivision resonance that it is characterized in that each sticking patch part each sticking patch partially-tuned to frequency range in a different frequency on.
8. the communication equipment of claim 1 is characterized in that the said shape that has at said sticking patch part at least one groove in each makes said sticking patch partly form twin coiled arrangement.
9. the communication equipment of claim 1 is characterized in that the frequency range that each sticking patch partly is tuned to depends on this sticking patch size partly.
10. the communication equipment of claim 1, it is further characterized in that:
One printed circuit board; And
A substrate is installed said built-in multi-band patch antenna thereon, and said substrate is installed on the said printed circuit board (PCB).
11. the communication equipment of claim 1 is characterized in that the size of sticking patch part is similar to 1/4 wavelength that is chosen as the partially-tuned different frequency range that arrives of sticking patch.
12. the communication equipment of claim 1 is characterized in that the bandwidth of said antenna depends on said sticking patch size partly, the shape of said at least one groove and position, and the thickness of said substrate and dielectric constant.
CNB998162191A 1998-12-16 1999-12-16 Printed multi-band patch antenna Expired - Lifetime CN1237655C (en)

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US09/212,259 US6343208B1 (en) 1998-12-16 1998-12-16 Printed multi-band patch antenna
US09/212,259 1998-12-16

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CN1237655C true CN1237655C (en) 2006-01-18

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JP (1) JP4409773B2 (en)
CN (1) CN1237655C (en)
AU (1) AU3092500A (en)
DE (3) DE19984046B3 (en)
GB (1) GB2363911B (en)
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